PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

What occurs if the LAV smoke detectors are not tested during the fire test?

1. System defaults to normal operation

2. Indication of potential malfunctions

3. All functions are terminated

4. It is noted as a failure in the test

The correct answer is: System defaults to normal operation

If the LAV smoke detectors are not tested during the fire test, the system defaults to normal operation. This means that the aircraft's fire detection system will not indicate a problem or malfunction simply because the smoke detectors were not tested; it assumes that they are functioning normally. This approach is in place to ensure that routine operations can continue without unnecessary alarms or disruptions if a specific component was not tested. When smoke detectors are a part of a larger safety system, their failure to be tested does not trigger any alarms or failures in the system's operation. Rather, the assumption is that unless there is evidence to suggest otherwise, every component should operate as expected. This default behavior is critical for maintaining operational readiness and avoiding unnecessary complications when other systems are functioning appropriately. On the other hand, options suggesting indications of malfunction or failure during tests would imply that the system actively monitors every aspect continuously, which is not the case here. The fire test is structured to assess the system's readiness without inherently penalizing untested components unless they manifest an observable issue.